Engiwe-testeb



W. E..HOLLENBECK AND W. R. GRAY.

ENGINE TESTER. Y

APPLICATION FILED MAR. 1. 1919.

Patented J My 29, 1919,

canine.

WILBUR E. I- OLLENBECK AITD WILLIAM R. GRAY, OF LENTNER, MISSGURI.

ENGINE-TESTER.

To all whom it may concern:

Be it known that we, VILBUR E. HOLLEN-' the same is to produce a tool whereby the close fit of a piston within a cylinder or of a valve within its scat may be tested accurately rather than by guess work.

The invention consists in details here-mafter more fully described and claimed andas shown in the drawings wherein Figure 1 is a plan view f parts of a cylinder casting with the heads of the cylinders removed showing this tool applied and ready for use.

Fig. 2 is an enlarged side elevation of the tool itself, with the cup partly broken away, and

Fig. 3 is a bottom plan view thereof.

The engine casting E in Fig. 1 has an opening C (here exposed by the removal of the cap plate) which constitutes one of the cylinders and contains a piston as usual. This casting also has an opening in which is mounted the valve, but both of these are hidden by the tool shown in plan View as covering the same. Said tool comprises a cup 1 in the shape of a' cylinder closed at its upper end and open at its lower end where it is surrounded by an outstanding shoulder 2, and in the bottom of the shoulder is a rubber ring or gasket 3. A gage 4 communicates with the upper end of the cup, and a nipple 5 with one side thereof, the nipple being of such form that it canbe connected with an ordinary hand pump for supplying air under pressure to the interior of the cup. lVithin the latter is a coiled expansive spring 6 secured at its upper end to the head of the cup and normally projecting below the lower end of the same so as to rest upon the valve and hold it to its seat,

Specification of Letters Patent.

Application filed March 1, 1919. Serial No. 280,023.

which passes a screw 14: whose head 15 rests on a washer 16 above said body, the threaded portion of said screw taking into one of the threaded openings in the casting in a manner which will be clear. The remote or outer end of the body is provided with a downturned foot 17. This foot rests upon the casting at an appropriate point, and when the screw is passed down through the slot and engaged with one of the holes in said casting, it is ob ious that by setting the screw, the toes are caused to bear down ward on the shoulder 2 so that the gasket 3 is compressed on the face of the castingaround the opening in which is situated the valve, for instance.

It is quite obvious that by making the de vice in sizes or larger than herein shown, it could be utilized for testing the close fit of a piston in a cylinder instead of a valve within its seat.

In use, after the cup has been applied as suggested above, a pump is attached to the nipple 5 and air is pumped into the cup, the pressure being indicated on the gage 4. Now this is allowed to stand, and if the air slowly leaks out of the cup through the article being tested, such leakage will be indicated by the movement of the hand on the gage. If, on the other hand, after a reasonable time there is little or no leakage, as shown by the terials, dimensions, et cetera, as may prove expedient and fall within the scope of the appended claims.

Having thus fully'described our inven ti'on, what we claim as new and desire to secure by Letters Patent is 1. The herein described engine tester com-- prising a cup having a gasket around its mouth, an air pressu-re gage supported by said cup and communicating with the interior thereof, a nipple also communicating It is to be understood that we Marl - With said interior for permitting the admission of air under pressure, and IIIQHUS engaging the cup adjacent the mouth thereof for pressing the mouth of the cup upon an article over the element therein to be tested.

2. In an engine tester, the combination with an inverted cup having an external shoulder around its open lower end, an aii gage communicating with its closed upper end, and means for admitting air under pressure to its interior; of a yoke having a longitudinal slot in its body and a downturned foot at one end, its other end being forked and the fork-arms having downturned toes bearing on said shoulder and retaining means for releasably connecting said yoke to the support.

3. In an engine tester, the con'ihination with an inverted cup having an external shoulder around its open lower end, an air gage eoni-inunicating with its closed upper end, and means for admitting air under pressure to its interior; oi a yoke having a lougitiulinally slotted body, forked at one end to pass astride said cup and bear on its shoulder. and a screw {passing ,down through said slot in the body and adapted to engage with the article being tested.

l. in atesting tool for engine valves, the combination with an inverted cup having a gasket surrounding its open lower end, a gage in its upper end, liieans tor admitting compressed air to its interior, and a spring carried by and within said cup for holding the valve on its scat; oi. clamping means for fastening said cup down upon the engine casting over the valve chamber, for the purpose set forth.

In a testing tool for engine valves, the combination with an inverted cup having a gasket surrounding its open lower end, a gage in its upper end, means for admitting compressed air to its interior, and a. spring carried by and within said cup for holding the valve on its seat; of a yoke having a dowuturned toot at one end and its other end forked and adapted to pass astride said cup and rest on its shoulder, and a screw passing through said yoke between its ends, for the purpose set forth.

6. In an engine tester, the combination with an inverted cup having an external shoulder around its open lower end, a gasket carried by said shoulder, an air gage cmnnninicating with the closed end of said cup, and means for adn'litt-ing air under pressure toits interior, of a. yoke having a longitudinally slotted body, forked at one end to pass astride said cup and bear upon said adapted to engage with an article being tested.

8. In an engine tester, the combination with an inverted cuip having an external shoulder around itslower end provided with a gasket, an air gage communicating with the closed end of said cup, a spring carried by and within said cup for holding a Valve on its seat, and a nipple for admitting air under pressure into said cup; of clamping means for ei'igaging said shoulder for fastenin said eup upon a support over a valve chamber.

9. In a testing tool for engine valves, the (fUllllhllltliilOll of an inverted cwp having a shoulde' at its lower end, an air gage connected to said cup, means for admitting air under pressure to said cup, of a yoke including a slotted body which is forked at one end to pass astride said cup, said forked end having downturned toes, to engage said shoulder, the ren'iaining end of said body having a downturned foot to engage a sup port, and a screw passingvthrough said slotted body to firmly clamp said yoke in a set position.

In. testimony whereof we atliX our signatures in presence oi: two witnesses.

WILB'UR E. HOLLENBECK. WILLIAM h. GRAY. Witnesses J. N. NINGATE, J. H. KING. 

